Peak, Kenneth J., author
Prentice-Hall, 1995
Buku Teks
Bayens, Gerald, author
McGraw-Hill, 2013
Buku Teks
Douglas, William O., author
Princeton University Press, 1960
Buku Teks
Douglas, William O., author
Princeton University Press , 1960
Buku Teks
Sitkoff, Harvard, author
Oxford University Press, 2000
Buku Teks